"People you may know" on Facebook, Please Help!!?

[Gina]

My boyfriend and I have had some issues in the past. We are now engaged to be married, before I take this huge step, I guess I want to be absolutely certain of what I am getting myself into. I have had trust issues because of the past and I have seen a few red flags here, but nothing concrete.

In any event, he left his facebook page open one night and it was on his "find friends" section, when I scrolled down to the "people you may know" the first 6 were half naked girls, single, interested in men and women and 1 was even a porn star. The odd thing is 5 of the pages only had 1 picture and like 15 friends, the 6th had 170 friends and a bunch of pictures. Also, none of these girls had mutual friends with my fiance at all nor are they from the same area.

My question is how does "People you may know" work? Why would the people you may know be all these scantily clad/porn star type girls? Where does the information get pulled from? I checked my "people you may know" and everyone in my list was people that I had several mutual friends with.

Any and all help is greatly appreciated! Thank you!